Drain structure



.P. E. KNUDSEN' ET AL 9 Aug. 7,1945.

DRAIN STRUCTURE Filed Nov. 19, 1943 a Sheets-Sheet 1 ZtW/S 6.01529 4 PERCY E KNUOSEN Aug. 7, 1945. P. KNUDSEN ET AL DRAIN S TRUCTURE Filed Nov. 19, 1943 3 Sheets-Sheet 2 anon/11km [Kw/s 6C Die-En 5 2 PERCY E KNUDJEN- Aug. 7, 1945. P. E. KN UDS EN E1 AL" 2,331,500 I pR IN STRUCTURE Filed Nov. 19, 1945 3 Sheets-Sheet 3 '-ing"the principles'of the inventionw j .PatentedAug.7,1945 I 2,381,500

P eirc'y' E. Knudsen and Lewis G Die a, Pittsburgh; I Pa assignorsito Pittsburgh-Plate Glass--Qom I pan'y, a corporation of Pennsylvania" 1 v ApplicationNovember 19, 1943; Serial No. 510,932 g I 1 A a r v Cl mj v r =;& I'he 'zpresent invention-..relates to drains for or FHerculitecL". The walls/include an outerretanks-orvvats and it has particular relation to 'inforcingshell,=l2 of .wood or thelike, the inner -drains 1for;vats or tanks lined withrplatemglass surface -of :.whi'ch is covered "by a thinplate [3 of and containing, acids or: other highlyEcOrrosive ordinaryi sheet glass: It will be noted that, the liquids. r I"; :inner: shell or, liner and the latter are substan- U OneNobject ofithe invention is toprovidea drain 5 tially spaced toreceive a packing 1420f asphalt .coixthen foregoingtype which is not subject to which preferably'is moderately high melting and -attacksby=corrosive acid i which is poured :into the space at a temperature .Avsecondnobjeot of the invention i rto rovid of about 350'to400" so that itwill flow com- .aidrain-whichislsimplaandl the"joints 'Of'whichi "-p t y't fi r and av ti s.

- are completely; sealed from leakage. 1 The drain structure l5 includes a pair of suz' Iheseiandlothet objects of thevinve'ntion will p p d ass' ase plat s 6 a d H, wh a ;be apparent. from consideration of-thefollowing d"- r by n intermediate layer l8 0f ,SePeciiicationand t appended claims; I acid resistant plastim The plates are disposed It-ehas heretofore been proposed to provide in openine 2Q=inshe1ll2 so that the inner of the 1tankS1fOr"3,Cid;;SuCh' as:;pick1ing*acids: and other glass pl es is e nbeddedin the asph ltic peeking corrosive liquids, having internalhwalls of glass l4 mayelse'be secured to t inner nin Sand t r supporting walls of wood 1 vnmtal, by means of a thin annular layer 2| of acid- ;Considerable'edifliculty has been .encountered in 'resistalnt'plasttc-fi The D ee"ab0ut the layer 2| the provision of such tanks of a drain structure is U- f p t from y s- -;which is simple, inexpensive, whichis not subject 'tering ep 23 and a e b di the torapid corrosion: and deterioration; and in P e B t e pe f q ds o whichleakage' of the contents'of' the tank throug the tank. 'It' is to be-observedthat drain-p 25 imperfectr jointsis positively prevented. i d sposed in the openi g 24 inl the P erm accordance .Withthe provisions of the -prest s rear e t y engage 's r 21, p entinvention it is proposed to overcome the'fore-'- 25- *Vided by the'edge of Op in plate oing difficulties, bythe provision of a drainstruce'P P' a threaded" of'iwelded nt etureiincludingasectionof drain-pipehavingabase e 'i length-81S c ted at Z n an Op of glassplates secured-thereto, which plates are 8 me l mpihg'orcover plate Which sealed in. mastic'- betweenthe inner-and outer 30 -D Sition in a rabbet' 31 "about Op 1 awalls oftheztank and which base'is provided with 20 inv e shell! 2 "by-means h h olts 32 'ac'over' platepbolted to the outer Walls'in' such i s ,a tt e' p ing. The rear exn manner that'the base plates can-bes'ecurely held ir i Of e ds cushioned in the open against em nh tank H i; 24 from contact with the glass plate l6 and also nFor a. better understanding of the invention 35 th t Y h m Contact with the referencemay noW'be had tothe accompanying cover'vplate t i/ 6 of a layer 33 0f glass drawings in which like numerals refer to -like 010th br'fiberimpregneied with afsphatt with parts thrgughoutand inwhich. L L 1 a'thermos'etting resin;such as urea' formaldehyde Fig;1 is aside elevational view of tank embody- 0r phenol forma'ldehyde or the like.

I L I 40 The space between the edges of the opening in Fig. 2 is a sectional iew sho'wing' ofia 'darger th e r w 2 a th ed esor the plate I6 "scale one-form ofthe drain-structure; f e conyeni'entlyjbe' filled witlracid-resistant i a-i 4 L ,v planyview f s suitable ng thermosetting plastic '34,"'such aphenOl-formal- .platefor'holding'the drainstructure in place; de abdvereferred i0! Figs: 4,5 and: G -are sectional-viewsshowing 011-545 i 1VQ1St1"llCtu re fOr closing the drain "maybe a larger scaleadditional forms of'the invention. eem'plisedhfi m ie p k 0r stopper in- The'='construction as shown inFigs;-1,=-2 and 3 sorted inth'e opening 22 or' it may include a valve comprises atank H), which maybe ofanysuitable e l l h e threaded e d h 3511f size and maybe-used,'for'exampleas Z dent-diner pipe 25 perforated disc 31 constitl'itin'g a 'forpicklingacids during metallurgicalpickling' seatsa'g a inst the rear endgof thepipe 'operanqnsfi A part,'e'. g., the bottom of t s eon- '25 in suchmannerthat mean easily be removed "tai'ner' is shown in greater detail in Fig. zand-inforcle'aning; j

cludesan'inner wall' comprising'aiplate" f-"g1'a"ss In 'Fig. 1; the us'eof thesame drain" structure 0fsubstantialithickness," e. g %yinch; wliiohiis intheside-walls of th t'ank asan overflow pipe "highiy acidresistant. The glassmay be tempered s illustrated at 38. I Y I In the form of the invention disclosed in Fig. 4 the discharge pipe 40 isentirely of glass. The construction otherwise is very similar to the embodiment of the invention already described. It includes a tank having a liner 4| of relatively heavy plate glass, an outer reinforcing shell 42 preferably of wood and a facing v43 of light sheet glass coveringthe inner-surface of the wood. The

space between thesheet glass 4,3'Qand the plate glass liner 4| is filled with asphalt 44 pouredin while hot and highly fluid.

The drain structure includes heavy glass base plates 46 and 41 superposed upon each otl'ier'a'nd disposed in openings 48 and 49 in the outer shell 42 and the plate 43. Preferably the asphalt i" The construction disclosed in Fig. 6 essentially corresponds to that of Fig. 4 except that the wooden shell is replaced by metallic shell 85 which, as shown, carries a ring 86 welded about the opening for the drain structure having flange 81 to which cover plate 88 is secured by bolts 89. The glass discharge tube or pipe 9| in ,this structure. is mounted essentially the same way as is the :pipe 40 shQW'n in. Figirlf. Additional description is not deemed to be necessary.

; The use of the drain structures in the bottoms of tanks has been particularly emphasized.

-I-Iowever, they can also be placed in the side poured about the plate 46 and is flowed into "Ch space between the back of the plate 4| and the inner surface of the plate 46 to provide-a thin 1 sealing layer 5|. H k in plates 4| and 46 in register with each other and in register with the bore of the discharge pipe 40.- An'annular space abouttheseopenings and between plates 4 and '46 is filled-with a layer of thermosetting resin 54,'whi'ch binds. the plates together and. also prevents the. asphalt; of the opening; during layer 5|? .from -flo'wing into. .the the pouring of the layer 44.1; o .It is to be observed thatplates Miami 41 are bonded together .byla-yerBB of acid-proofmastic and that the plate 41 is formed with an-inwardly Openings 52. and 53 are formed L flared ;-opening 51 receiving aucorrespondingly phenol-formaldehyde-or the like. It is to be ob-,

served that the bor of discharge tube 4|lis slightly less in diameter than theopening 53, thus providing'a shoulder portion 6| at the rear, of the tube, against which a str ainer 62 is seated.

e. Space e e nth d sor he. in 4 l n the Woo re nfor s e l. a d th ed es of the, plates 46. and 4 may be sealed with mastic. In brder .positivelyto clamp the plates 46 and 4 1 in t p ti a. qqv plate 2 p e e a l of p yjwoodlis provided and has margins set in vrabbeted portion fi4-in thewood offithe shell; The plate maybe clamped or-fheld by means of through :66 extending, through suitable holes in the shell and also the plate and having'nuts ,6! threaded thereupon. The drain may be closed in any convenient manner by means of a valve or more simply by means of a mere plug -68 of rubber or any other convenient corrosion-resistant material. V I o The constructionshown in Fig. 5' substantially corresponds to that disclosed in Figs. 2 and 3, except that the wooden reinforcing shell has been replaced by a metal shell 10. The opening 1| in this shell for the drain structure is surrounded by a ring 12 of metal orthe like welded to the shell, as indicated at 13 and having an annular flange "l4 weld'edto the outer edge. thereof. The cover plate. 16 in this construction corresponds essentially to. that of the plate29 already described and the drain-pipe 11 is welded in an opening therein as indicated at 18. fljhis drain may be closed by stopper or valve or asshown by means of a glass ball 19 :having a pull chain or rod 8| connected thereto.

A secure unitarystructure is thus obwalls, eitheras drains or as overflow pipes.

j ."The constructions herein shown are simple and ideally designed for use in glass lined tanks. They are corrosion'resistant to a high degree and are not "subjecttodeakage about the joints.

The forms ofthe invention herein disclosed are to be regarded merely as exemplary. It will be apparent to thoseinskilled in the art that numerousmodiflcations may be made therein without departuresf-rom the scope of the invention or the .spiritof the appended claims.

What we claim is:

1. In combination a container: for corrosive liquids including an irmerliningizof-plate glass,

an outer reinforcing shell spaced therefrom, the spacebetween the two being filledwith a corrosion-resistant packing material, said inner lining being formed witha drain opening and the reinforcing shell having an-openingfiof larger diameter registering with the drain opening, a drain structure including a glass-base plate contiguous to the lining about the opening. inthe lining and being. embedded in the-:packingmmaterial and carrying an outwardly-projecting dra'impipe and clamping meansnengagingxthe :base plate and being secured to the reinforcing shell by means of through bolts... i l v v I: ,2. In, combination ,a container for cor rosive yliquids including. an inner lining of plate glass, aniouter. reinforcing :shellspaced therefrom, the

space between :the two being filled with a corrosion-resistant packing =material,.:said inner lining being .formedpwith 'aydrain opening and the reinforcing shell having an opening of larger diameterregistering ;with the drain opening, aerain structure including waqlpair of, superposed base plates having openings formed. therein, register- .ing with the drain opening, the inner of said'base plates-being embedded in thepacking material,

the opening formed therein being of less diameter than the openingin the outer p1ate,:a drain pipe seated in the opening in-the outer plate and. bearing against the edge of the: opening in the inner plate. and a cover plate disposed-about the drainpipe and being bolted to the'outer'shell.

3. In. combination a container lfor corrosive liquids including an inner lining of. plate glass,

anouter reinforcing shell" spaced therefrom, the

space between. the two-being filled with a corrosion-resistant I packing. material; said inner lining .ing with the drain opening, ythe innerof said base plates being embedded in; the packing j material, t e QP n .fOrm .h in being 3. dia e h n he p ns nlt gbute ate ;-a a n seated in the openin 'in the ollter plate. and bear- ..ingagainst the, edge ofthe opening; in the inner ..7 5'

2 2 an a se e gd pd d e b? th e I 2,381,500 pipe and being bolted to the outer shell, said base plates being embedded in the packing material, the opening formed therein being of less diameter than the opening in the outer plate, a drain-pipe of glass seated in the opening in the outer plate and bearing against the edge of the opening in the inner plate and a cover plate disposed about the drain-pipe and being bolted to the outer'shell, the opening in the outer of the glass base plates being inwardly flared and said drain-pipe being correspondingly fiared, positively to key the two together in the assembled structure.

inner plate and a cover plate disposed about the drain-pipe and being bolted to the outer shell, a perforate strainer plate engaged in the rear extremity of the drain-pipe.

6. A drain assembly for containers which containers have inner and outer walls, the space between being filled with an intermediate impervious packing and a drain opening in the inner wall, a larger registering opening in the outer wall, said assembly comprising two superposed base plates adapted to fit into the second opening and having openings therein adapted to register with the first opening, a cover plate having margins adapted to be bolted to the outer walls of said container, the 'cover plate having an opening formed therein coaxial with the openings in the base plates, 9. drain pipe projecting through the outer of the base plates, said pipe projecting in the openings in said cover plate.

7. A drain assemblyfor a container, which container comprises an inner glass wall, an outer re-' 1 inforcing wall spaced therefrom and an intermediate impervious packing of fusible plastic material between the walls, said inner wall having a drain opening formed therein, said outer wall having a. larger opening registering with the drain 5. In combination a container for corrosive liquids including an inner lining of plate glass, an outer reinforcing shell spaced therefrom, the

space between the two being filled with a corrotheopening formed therein being of less diam eter than the opening in the outer plate, a drainpipe seated in the opening in the outer plate and bearing against the edge of the opening in the opening, said assembly including a pair of superposed glass base plates fitting into the latter opening and having registering openings formed therein, the outer of said base plates having the opening therein-inwardly flared, a glass drain-pipe having a base portion fitting the opening in the outer base plate and a cover plate adapted to fit over the opening in the outer wall and having an opening receiving the drain-pipe, said coverplate being adapted to be bolted to the outer wall.

8. A construction as defined in claim 6 in which the drain-pipe and cover plate are of metal and are welded together to provide a unitary assembly.

PERCY E. KNUDSEN. LEWIS G. DIERA. 

